/*
	@author : "likaituan",
	@email : "61114579@qq.com",
	@version : "4.0",
	@date : "2010-09-05",
	@lastime : "2011-8-18"
*/


//组合结果数组
F.combine = function (a,n,t){
	if (n==0) return [t];
	var r = [];
	for(var i=0; i<=a.length-n; i++){
		r = r.concat(arguments.callee(a.slice(i+1), n-1, t.concat(a[i])));
	}
	return r;
};